JPH0237523Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a power cutting tool that has a surface plate that serves as a reference surface during cutting, and allows the angle between the rotary blade and the surface plate to be freely adjusted within a certain range.

The content of the present invention will be explained below using an example of an electric circular saw. As shown in Fig. 1, a conventional electric circular saw machine includes a main body 1 containing a power section, a saw blade 2 which is a rotating blade driven by the power section, a fixed cover 3 that covers the saw blade 2, and a safety device. It consists of a cover 4, a surface plate 5 that serves as a reference surface during cutting, an angle adjustment plate 6 and a link 19 that connect the surface plate 5 and the fixed cover 3, and the like.

Further, the bolts 18 are connected to the fixed cover 3 and the link 1.
By loosening the bolt 18, the link 19 can be rotated around the pin 17 within the range of the elongated hole 7, and by tightening the bolt 18, the fixed cover 3 can be fixed at any position.
and the link 19 can be fixed. This makes it possible to adjust the depth of cut.

In FIG. 2, the surface plate 5 is provided with an elongated hole 9 having a rotation center 8, and the angle adjustment plate 6 is provided with a bolt 1.
0 is fixed, and can be fixed at any angle with a chisel bolt 11 through an elongated hole 9.

Generally, the bottom surface 16 of the surface plate 5 in an electric circular saw machine
The adjustment range of the angle formed by the saw blade 2 (hereinafter referred to as the angle of inclination 12) is mostly from 90° to 45°, as shown in Figure 3, and the angle of inclination 12 was set to the minimum of 45°. In this case, the cutting edge 13 of the surface plate 5 is connected to the safety cover 4.
A certain amount of clearance is ensured to avoid hitting the target. When cutting wood or the like using a conventional electric circular saw configured as described above, there is a drawback in that small pieces of wood or the like tend to enter the blade opening 13, which impairs work efficiency.

In addition, in order to eliminate this drawback, if you simply make the blade edge 13 narrower, if you try to set the inclination angle 12 to 45 degrees, the blade edge 13 of the surface plate 5 will hit the safety cover 4, making it impossible to set it to 45 degrees. There is a fear.

The purpose of the present invention is to eliminate the above-mentioned drawbacks of the prior art and to improve the cutting workability of this type of power cutting tool.

This invention focuses on the fact that the cutting edge of the surface plate can be made narrower by moving the center of rotation of the angle adjustment plate, link, and surface plate closer to the bottom of the surface plate. It was devised.

Figure 3 shows an example of the present invention in an electric circular saw machine.
This will be explained using FIGS. 4 and 5. The configuration of the electric circular saw machine of this embodiment is the same as that of the prior art, but the following points have been improved. As shown in FIG. 4, square holes 14 are provided at the front and rear of the surface plate 5. As shown in FIG.
They are each connected to the surface plate 5 while being inserted into the square holes 14 to the extent that they do not protrude from the bottom surface 16 of the plate. With this configuration, the rotation center 8 position of the angle adjustment plate 6, link 19, and surface plate 5, that is, the dimension d in FIG. 3 is reduced. In the improved embodiment as described above, as shown in FIG. 3, the width of the cutting edge of the surface plate 5 can be made narrower than that of the conventional technique, considering the size reduction relative to the conventional technique.

According to this invention, by lowering the rotation center position (connection position), the cutting edge of the surface plate can be narrowed, so when cutting wood, etc., small pieces are less likely to enter the cutting edge, improving work efficiency. .

[Brief explanation of the drawing]

Figure 1 is a front view of an electric circular saw machine showing an example of a power cutting tool, Figure 2 is an enlarged view of arrow A in Figure 1, and Figure 3 is an enlarged view of arrow A in Figure 1.
The figure is a sectional view taken along the line -- in FIG. FIG. 4 is a plan view of the surface plate of the present invention, and FIG. 5 is a sectional view taken along the line -- in FIG. 1 is the main body, 2 is the saw blade, 3 is the fixed cover, 4 is the safety cover, 5 is the surface plate, 6 is the angle adjustment plate, 7 is the elongated hole of the link, 8 is the rotation center (connection position), 9 is the length hole, 10 is a bolt, 11 is a chiyo bolt, 12 is an inclination angle, 13 is a cutting edge, 14 is a square hole, 15 is a lower end, 16 is a bottom surface, 17 is a pin, 18 is a bolt, 1
9 is a link.

Claims (1)

[Scope of utility model registration request] A rotary blade protruding from the bottom surface of the surface plate, an angle adjustment plate that can freely fix the angle formed by the rotary blade and the surface plate within a certain range, and an angle adjustment plate that works in conjunction with the angle adjustment plate and is integrated with the surface plate when adjusting the depth of cut. In the power cutting tool, the power cutting tool has a link that supports the surface plate at a constant depth of cut, and the power cutting tool is provided at the front and rear of the surface plate so that the center of rotation of the surface plate with respect to the angle adjustment plate is at a lower position. A power cutting tool characterized in that the power cutting tool has a structure in which a hole is provided, and the angle adjustment plate and the lower end of the link are respectively inserted into the hole to be connected to the surface plate.